Artificial turf is gradually replacing part of natural turf due to its unique advantages and advantages.At present, it has been widely used for children and adults to play in the meadows, parks and various sports venues, especially school sports venues.But is artificial turf really good for us?The answer, of course, is no.The volatilization of toxic and harmful chemical pollutants and the "heat island effect" in artificial turf materials have attracted extensive attention to atmospheric environment and possible hazards in human beings.

1. Domestic situation of campus artificial turf

At present there are more than 20 domestic artificial turf producers, production of artificial turf quality, cheap products, domestic knitting low-end industries developed at the same time, but the core material preparation of high-end industry blank, grass fiber from scale, equipment, technology, product quality, measures such as sales ability, the only a few of real power.The high price of quality artificial turf has put many schools off, so they have to buy low-priced and low-quality products from small factories, or the successful ones use low-quality materials to produce lawns for greater profits.

The structure of artificial turf

Artificial turf consists of three layers of material.The foundation is composed of compacted soil, gravel and asphalt or concrete.Above the base layer is a cushion layer, usually made of rubber or styrofoam.The third layer, also the surface layer, is the grass cortex.Based on the surface shape of the production of fluff grass, circular curl nylon grass, leaf-shaped polypropylene fiber grass, nylon produced by the permeable grass.

Third, the grass cortex toxic and harmful chemical pollutant hazard identification

Artificial turf is made of a mixture of polyethylene and polypropylene and woven to simulate grass leaves.This kind of "grass" is laid vertically, mostly polyethylene (PE) and polypropylene (PP) give priority to, also can use polyvinyl chloride and polyamide to wait.The leaves are green like natural grass.Plastics contain a large amount of chemicals known or suspected to cause health effects.In order to improve or compensate for the properties of plastic materials, manufacturers add additives to raw materials to enable them to have more new functions -- natural grass color, flame retardant properties, high temperature resistance, uv absorbent, structure enhancement and wear resistance.However, it is often these varieties of additives that, after improving and enhancing some properties of the materials, also become the main hazard factor for the secondary pollution of artificial turf.The main pollution factors and their hazards of regenerated plastic fibers and rubber pellets will be presented one by one in the form of table below: